Clock-work for mechanical lamps



(NoModeL) F. 000K & *J. .HQ POMEROY. GLOGK- WORK FOR MEGHANIG-AL'LAMPS.

'N0.'310,651. Patented Jan. 13,1885.

wnusssx-zs: v INVENTOR: Q ATTORNEYS.

llNiTED STATES PATENT l' FFICE.

FREDERICK COOK AND JOHN H. POMEROY, OF NEW HAVEN, CONNECTICUT.

CLOCK-WORK FOR MECHANICAL LAMPS.

SPECIFICATION forming part of Letters Patent No. 310,651, dated January 13,1885.

(N0 model.)

1'0 aZZ whom it may concern.-

Be it known that we, FREDERICK 000K and JOHN H. POMEROY, of the city and county of New Haven, and State of Connecticut, have invented a new and useful Improvement in Clock- Works for Mechanical Lamps, of which the following is a full, clear, and exact description.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in both the figures.

Figure l is a plan view of our improvement, part being broken away. Fig. 2 is a side elevation of the same, partly in section.

The object of this invention is to prevent the fan-driving band from exerting an injurious side draft upon the fan-post.

The invention consists in a clock-work for mechanical lamps, made with the fan-shaft connected with the gear-wheels of the clockwork by an elastic driving-band, as will be hereinafter fully described.

A represents the frame of the clock-work. B is the coiled driving-spring, and C are the gear-wheels.

To the top of the frame A is attached the casing D, that incloses the fan E, attached to the upper part of the post F. The upper end of the fan-post F revolves in a bearing in a cross-bar, G, attached to the upper part of the fan-casing l). The lower end of the fan-post F revolves in a jeweled step-bearing, H, in the upper part of the clock-work frame A.

To the lower part of the fan-post F is attached a small pulley, I, around which passes a band, J. The band J also passes around a larger pulley, K, attached to the posts of apinion, c, which meshes with the last gearwheel,C,of the clock-work, so that the fan will be driven from the said clock-work.

The band J is made of rubber or other suitable elastic material, so that a sufficient tension can be given to the said band to drive the fan without making the band so taut as to exert an injurious side pull upon the fan-post F, which result cannot be obtained with an inelastic band, as is found in practice, owing to the difficulty of making the said inelastic band of exactly the right length to secure the requisite driving friction without an injurious pull. By this improvement, also, is avoided the unpleasant noise which is unavoidable when the connection between the clock-work and fan-shaft is made by gear-wheels.

Having thus described our invention, we claim as new and desire to secure by Letters Patent 1. A clockwork for mechanical lamps,n1ade, substantially as herein shown and described, with the fan-shaft connected with the clockwork gear-wheels by an elastic driving-band, as set forth.

2. In a clock-work for mechanical lamps,the combination,with the clock-work gear-wheels B and the fan-shaft F, of the pulleys K I and the elastic band J, substantially as herein shown and described,whcreby the fan will be driven without any injurious side pull upon the fanpost and without noise, as set forth.

FREDERICK COOK.

JOHN H. POMIEROY. Witnesses:

N. GREENMAN, WV. A. WILKINsoN. 

